+/*
+ * Copyright (c) 2015 Cisco Systems, Inc. and others. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+
+package org.opendaylight.protocol.pcep.spi;
+
+import static org.opendaylight.protocol.util.ByteBufWriteUtil.writeUnsignedShort;
+
+import com.google.common.base.Preconditions;
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.ero.Subobject;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.ero.SubobjectBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.PathKey;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.PceId;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.explicit.route.subobjects.subobject.type.PathKeyCase;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.explicit.route.subobjects.subobject.type.PathKeyCaseBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.explicit.route.subobjects.subobject.type.path.key._case.PathKeyBuilder;
+
+/**
+ * Parser for {@link PathKey}
+ */
+public abstract class AbstractEROPathKeySubobjectParser implements EROSubobjectParser, EROSubobjectSerializer {
+
+ public static final int TYPE_32 = 64;
+ public static final int TYPE_128 = 65;
+ protected static final int PCE_ID_F_LENGTH = 4;
+ protected static final int PCE128_ID_F_LENGTH = 16;
+ protected static final int CONTENT128_LENGTH = 2 + PCE128_ID_F_LENGTH;
+ protected static final int CONTENT_LENGTH = 2 + PCE_ID_F_LENGTH;
+
+ protected abstract byte[] readPceId(final ByteBuf buffer);
+
+ protected abstract void checkContentLenght(final int i) throws PCEPDeserializerException;
+
+ @Override
+ public final Subobject parseSubobject(final ByteBuf buffer, final boolean loose) throws PCEPDeserializerException {
+ Preconditions.checkArgument(buffer != null && buffer.isReadable(), "Array of bytes is mandatory. Can't be null or empty.");
+ checkContentLenght(buffer.readableBytes());
+ final int pathKey = buffer.readUnsignedShort();
+ final byte[] pceId = readPceId(buffer);
+ final PathKeyBuilder pBuilder = new PathKeyBuilder();
+ pBuilder.setPceId(new PceId(pceId));
+ pBuilder.setPathKey(new PathKey(pathKey));
+ final SubobjectBuilder builder = new SubobjectBuilder();
+ builder.setLoose(loose);
+ builder.setSubobjectType(new PathKeyCaseBuilder().setPathKey(pBuilder.build()).build());
+ return builder.build();
+ }
+
+ @Override
+ public final void serializeSubobject(final Subobject subobject, final ByteBuf buffer) {
+ Preconditions.checkArgument(subobject.getSubobjectType() instanceof PathKeyCase, "Unknown subobject instance. Passed %s. Needed PathKey.",
+ subobject.getSubobjectType().getClass());
+ final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.explicit.route
+ .subobjects.subobject.type.path.key._case.PathKey pk = ((PathKeyCase) subobject.getSubobjectType()).getPathKey();
+ Preconditions.checkArgument(pk.getPceId() != null, "PceId is mandatory.");
+ Preconditions.checkArgument(pk.getPathKey() != null, "PathKey is mandatory.");
+ final byte[] pceID = pk.getPceId().getBinary();
+ Preconditions.checkArgument(pceID.length == PCE_ID_F_LENGTH || pceID.length == PCE128_ID_F_LENGTH, "PceId 32/128 Bit required.");
+ final ByteBuf body = Unpooled.buffer();
+ writeUnsignedShort(pk.getPathKey().getValue(), body);
+ body.writeBytes(pceID);
+ EROSubobjectUtil.formatSubobject(pceID.length == PCE_ID_F_LENGTH ? TYPE_32 : TYPE_128, subobject.isLoose(), body, buffer);
+ }
+}